Mark Williams, PA
Physician Assistant · Medford, OR
Mark Williams, PA is a physician assistant with a practice address in Medford, Oregon, and NPI 1265742662, issued on Oct 19, 2010. Check the license (Oregon PA152965, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Williams
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA152965 OR
Self-reported in NPPES; status is on the state search - Practice location
- 691 Murphy Road, Medford, OR 97504
- Phone
- (541) 789-6460
- Enumerated
- Oct 19, 2010
- Record last updated
- Oct 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (541) 789-6461
- Medicare enrollment
- Enrolled (PECOS I20111110000059); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 2,094 in Oregon → Look up another NPI →
Also registered at 691 Murphy Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license PA152965Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average physician assistant in 2024
2,208 Medicare Part D claims for 590 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium130 claims
- Levothyroxine Sodium115 claims
- Amlodipine Besylate85 claims
- Losartan Potassium69 claims
- Lisinopril49 claims
- Tamsulosin Hcl49 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Rogue Valley PhysiciansMedford, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Williams among 2,094 physician assistant records in Oregon
Mark Williams, PA is one of 2,094 physician assistant records with a practice address in Oregon. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 27% of them.
- NPI issued2010 · 27% of these records are older, 69% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2010 · median 2017 among the 1,552 with a school on file
- Record last updated2020 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
121 physician assistant records list a practice address in Medford
They are 121 of the 4,542 NPPES records with a practice address in Medford, and 2,094 physician assistant records in Oregon.
All 2,094 in Oregon → Every provider in Medford → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Gregory Caldwell, P.A-CMedford, OR 975041023051190
- Micheline Cavallacci, PA-CMedford, OR 975041235113994
- Abby Coats, P.A.Medford, OR 975041548341738
- Jonathan Coniglio, PA-C, ATCMedford, OR 975041326082488
- Peter Gray, PA-CMedford, OR 975041528037397
- David Greene, PA-CMedford, OR 975041336189547
- Timothy Hall, P.A.-CMedford, OR 975041851319917
- Gordon Hart, PA-CMedford, OR 975041801852827
Common questions
What is Mark Williams, PA's NPI number?
Mark Williams, PA's National Provider Identifier (NPI) is 1265742662, issued on Oct 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mark Williams, PA located?
The NPPES record lists a practice address at 691 Murphy Road, Medford, OR, 97504. Phone: (541) 789-6460. Providers update this record themselves, so call before visiting.
How can I verify Mark Williams, PA's license?
NPPES lists Oregon license number PA152965, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Williams, PA prescribe under Medicare Part D?
In 2024, Mark Williams, PA had 2,208 Medicare Part D claims for 590 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.